The Nurek Dam, commissioned in 1972, is the highest dam in the world (300 m high). It is a large earth-fill dam with 3,000 MW of installed capacity. It controls the Vakhsh River, main Amu Darya River affluent with the Pyanj River. The Amu Darya is the largest river of Central Asia, and one of the two main tributaries of the Aral Sea.